Really? Cause I'm a forty something and i still see all the same places as when i was in your situation: School, work, coffee shops, sports, social clubs, activities, pretty much every place i go has opportunity to casually talk to someone. Funny enough night life locations are probably the worst: Loud, dark, competitive and everyone has their guard up.

My suggestion: Seek out interesting conversation with people, don't target a potential mate. You'll greatly increase your potential pool of both friends and romantics, plus improve your standing within it